Аidos Issadykov
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View article: Revisiting radiative transitions of charmonium states in a covariant confined quark model
Revisiting radiative transitions of charmonium states in a covariant confined quark model Open
We calculate the amplitudes and branching fractions of χ c J ( 1 P ) , h c ( 1 P ) , J / ψ ( 1 S ) , and ψ ( 2 S ) radiative decays in the framework of the covariant confined quark model. First, we explicitly show that all ca…
View article: A realistic photon spectra in polarized $$\gamma \gamma $$ processes in SANCphot
A realistic photon spectra in polarized $$\gamma \gamma $$ processes in SANCphot Open
This work presents an approach to improve the precision of polarized photon–photon collisions simulation implemented in the SANCphot package. The basic linear Compton approximation of the incoming photon spectrum is extended to a general e…
View article: Angular observables and branching ratio for $B_s\to ϕ\ell^+ \ell^-$ decay
Angular observables and branching ratio for $B_s\to ϕ\ell^+ \ell^-$ decay Open
In this paper, an analysis of the $B_s\to ϕ\ell^+ \ell^-$ rare decay is presented within the framework of the covariant confined quark model. The $B_s\to ϕ$ transition form factors are calculated and then used to compute the branching frac…
View article: Revisiting radiative transitions of charmonium states in covariant confined quark model
Revisiting radiative transitions of charmonium states in covariant confined quark model Open
We calculate the amplitudes and branching fractions of $χ_{cJ}$, $h_c$, $J/ψ$, and $ψ(2S)$ radiative decays in the framework of the covariant confined quark model. First, we explicitly show that all calculated amplitudes are gauge invarian…
View article: A realistic photon spectra in polarized γγ processes in SANCphot
A realistic photon spectra in polarized γγ processes in SANCphot Open
This work presents an approach to improve the precision of polarized photon-photon collisions simulation implemented in the SANCphot package. The basic linear Compton approximation of the incoming photon spectrum is extended to a general e…
View article: Two-Loop QED/QCD Corrections for the Polarized γγ → γγ Process in SANCphot
Two-Loop QED/QCD Corrections for the Polarized γγ → γγ Process in SANCphot Open
The new version of the SANCphot integrator has been developed for fast and stable numerical calculations up to two loops for polarized light-by-light scattering. One-loop modules based on the helicity formalism with massive particles and t…
View article: Visible Light-Driven Photocatalysis of Al-Doped SrTiO3: Experimental and DFT Study
Visible Light-Driven Photocatalysis of Al-Doped SrTiO3: Experimental and DFT Study Open
Environmental problems associated with water pollution caused by organic dyes have raised serious concerns. In this context, photocatalytic processes have proven to be promising and environmentally friendly methods for water purification u…
View article: Two-loop QED/QCD corrections for polarized $γγ\rightarrowγγ$ process in SANCphot
Two-loop QED/QCD corrections for polarized $γγ\rightarrowγγ$ process in SANCphot Open
The new version of the SANCphot integrator has been prepared for fast and stable numerical calculations up to two loops for polarized light-by-light scattering. One-loop modules based on the helicity formalism with massive particles and tw…
View article: Calculation of form factors, stringing and angular observables for the 𝑩→𝝎transition in the framework of the covariant quark model
Calculation of form factors, stringing and angular observables for the 𝑩→𝝎transition in the framework of the covariant quark model Open
The paper is devoted to the study of the 𝐵→𝜔transition in the framework of the covariant quark model, which is a theoretical approach to describe the hadron dynamics taking into account the quark structure. The aim of the work is to calcul…
View article: Synthesis, Structure, and Energetic Characteristics of Perovskite Photocatalyst SrTiO3: an Experimental and DFT Study
Synthesis, Structure, and Energetic Characteristics of Perovskite Photocatalyst SrTiO3: an Experimental and DFT Study Open
SrTiO3-based photocatalysts have become widely used due to their excellent properties such as high thermal stability, photocorrosion resistance, and stable structure that can be modified by doping and making composites. In this work, SrTiO…
View article: Anomalies in Weak Decays of Hadrons Containing a b Quark
Anomalies in Weak Decays of Hadrons Containing a b Quark Open
A brief review of the current state of observed deviations of theoretical predictions from experimental data in semileptonic decays of $B$ and $B_c$ mesons is given. A theoretical analysis of these decays is carried out, taking into accoun…
View article: Anomalies in Weak Decays of Hadrons Containing a b Quark
Anomalies in Weak Decays of Hadrons Containing a b Quark Open
A brief review of the current state of observed deviations of theoretical predictions from experimental data in semileptonic decays of $B$ and $B_c$ mesons is given. A theoretical analysis of these decays is carried out, taking into accoun…
View article: Bc∗ meson parameters and radiative decay width within the covariant confined quark model
Bc∗ meson parameters and radiative decay width within the covariant confined quark model Open
In this work, we tried to predict the parameters of [Formula: see text] meson. Simple assumptions gave us the following parameters [Formula: see text][Formula: see text]MeV and [Formula: see text][Formula: see text]MeV (for [Formula: see t…
View article: $B \to K^{(\ast)} ν\barν$ in covariant confined quark model
$B \to K^{(\ast)} ν\barν$ in covariant confined quark model Open
We study the $B \to K^{(\ast)} ν\barν$ decays within the Standard Model (SM) by using the relevant transition form factors obtained from the covariant confined quark model (CCQM) developed by us. The $B \to K$ and $B\to K^\ast$ transition …
View article: $B \to \pi$ Decay Form Factors from Covariant Confined Quark Model
$B \to \pi$ Decay Form Factors from Covariant Confined Quark Model Open
We evaluate $B \to \pi$ transition form factors in the full kinematical region within the covariant confined quark model. We compare the obtained results with other theoretical approaches
View article: Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ ν_\ell$ in view of LHCb observation
Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ ν_\ell$ in view of LHCb observation Open
In light of the LHCb observations about the $B_s \to D_s^{(*)}\ell ν_\ell$ semileptonic decays, we study these channels within the Standard Model framework of covariant confined quark model. The necessary transition form factors are comput…
View article: Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ \nu_\ell$ in view of LHCb observation
Form factors and branching fraction calculations for $B_s \to D_s^{(*)} \ell^+ \nu_\ell$ in view of LHCb observation Open
Here, we study the $B_s \to D_s^{(*)}\ell \nu_\ell$ semileptonic decays within the Standard Model framework of covariant confined quark model. The necessary transition form factors are computed in the entire dynamical range of momentum tra…
View article: Calculation of doubly heavy baryons decay
Calculation of doubly heavy baryons decay Open
We calculated a subclass of four nonleptonic two-body weak decays of the double charm baryon ground states Ξcc++. Nonleptonic decays can be dividedinto two group: factorizable and nonfactorizable decays. The first one can be easily calcula…
View article: Rare $b \to d$ decays in covariant confined quark model
Rare $b \to d$ decays in covariant confined quark model Open
In this article, we study the rare decays corresponding to $b \to d$ transition in the framework of the covariant confined quark model. The transition form factors for the channels $B^{+(0)} \to (π^{+(0)}, ρ^{+(0)},ω)$ and $B_s^0 \to K^{(*…
View article: $Y(4260)$ as four-quark state
$Y(4260)$ as four-quark state Open
We treat the $Y(4260)$ resonance as a four-quark state in the framework of the covariant confining quark model. We study two choices of the interpolating current, either the molecular-type current which effectively corresponds to the produ…
View article: COMET Phase-I technical design report
COMET Phase-I technical design report Open
The Technical Design for the COMET Phase-I experiment is presented in this paper. COMET is an experiment at J-PARC, Japan, which will search for neutrinoless conversion of muons into electrons in the field of an aluminum nucleus ($\mu$–$e$…
View article: B → ρ decay form factors from covariant confined quark model
B → ρ decay form factors from covariant confined quark model Open
We evaluate $B \\rightarrow \\rho$ transition form factors in the full\nkinematical region within the covariant confined quark model. We compare the\nobtained results with the results from light-cone sum rules. The calculated\nform factors…
View article: b-s Anomaly Decays in Covariant Quark Model
b-s Anomaly Decays in Covariant Quark Model Open
The work is devoted to the study of b-s anomaly decays. We evaluated\nbranching fractions of $B\\to K^\\ast \\mu^+\\mu^-$, $B^0_s\\to \\phi\\mu^+\\mu^-$ and\n$B_s\\to \\mu^+\\mu^-$ decays and compared them with available experimental data\…
View article: Selected decays of heavy mesons in covariant confined quark model: Semileptonic and Nonleptonic Decays of $B_c$ Meson
Selected decays of heavy mesons in covariant confined quark model: Semileptonic and Nonleptonic Decays of $B_c$ Meson Open
We use the so-called covariant confined quark model to compute branching fractions for several semileptonic and non-leptonic decay modes of the $B_c$ meson.
View article: Study of the B<sub>c</sub> → J/ψ + D<sup>(*)</sup><sub>q</sub> decays in covariant confined quark model
Study of the B<sub>c</sub> → J/ψ + D<sup>(*)</sup><sub>q</sub> decays in covariant confined quark model Open
In this work we study the B c → J/ψ + D(*) q decays. It was defined ratios (R D*s/Ds , R D*/D , R D*/ D*s and R D/Ds ) of nonleptonic branching ratios of B c meson, which will be hopefully tested on LHC experiments. We compare the obtained…
View article: The study of b-s anomaly decays in covariant quark model
The study of b-s anomaly decays in covariant quark model Open
The work is devoted to the study of b-s anomaly decays. We compute the relevant form factors in the framework of the covariant quark model with infrared confinement in the full kinematical momentum transfer region. The calculated form fact…